Pretty sure the author means "must not" or "should not", because they absolutely can.
Characterizing the difference between humans and AI is going to be important.
Pointing out that AI is software isn't helpful in answering that question.
If I write a program:
if (rand() % 2) launch_missles();
And wire that function to actually launch a missile, the computer didn’t make a decision. And so it is with people prompting agents.